rBST and rBGH are synthetic hormones given to dairy cows to increase their total milk production. The added hormone has raised fears from environmental and health activist groups that the milk and dairy products produced by these cows could negatively impact human health. Research has found, however, that dairy products from rBST cows are no different than those from cows not given rBST. What do these hormones do? rBST and rBGH boost a naturally-occurring protein in the cow’s pituitary gland that controls milk production. When given to cows, they extends the period of heightened milk production that occurs after a cow gives birth...